MULTICOLOR THERMOSENSITIVE MEDIUM AND PRINTING APPARATUS
In a multicolor thermosensitive medium and a printing apparatus, the multicolor thermosensitive medium includes: a base material; and a plurality of coloring layers including: a lamination group laminated on the base material and including one or more lower coloring layers; and an upper coloring layer laminated on the lamination group and having higher hiding properties at a portion where a color is developed than the lower coloring layers, wherein each coloring layer has coloring properties different from each other with regard to a heating temperature level necessary for color development, and wherein the upper coloring layer develops the color at a higher temperature than any of the lower coloring layers in the lamination group, and wherein the printing apparatus includes: a thermal head that applies thermal energy to the multicolor thermosensitive medium from a direction of the upper coloring layer.
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The present application is a continuation-in-part application based upon and claims the benefit of the prior PCT International Patent Application No. PCT/JP2011/072320 filed on Sep. 29, 2011, the disclosure of which is herein incorporated by reference in its entirety.
TECHNICAL FIELDThe disclosure relates to a multicolor thermosensitive medium provided with a plurality of coloring layers, and a printing apparatus.
BACKGROUNDAs a technique relating to the multicolor thermosensitive medium having a plurality of coloring layers and the printing apparatus using thereof, there has conventionally been proposed, for instance, color thermosensitive recording paper including a black coloring layer therein to form a four-layered structure. Further, there is conventionally proposed a multicolor thermosensitive printing apparatus of a thermal recording system utilizing multicolor thermosensitive paper having a thermosensitive layer formed through applying hot-melting inks of four colors; yellow, magenta, cyan and black, whose melting points are different from each other, in a laminated manner on a base material.
Here, with a conventional printing apparatus, in a case of developing a color at the black coloring layer among the plurality of coloring layers in the multicolor thermosensitive medium, larger amount of application energy is required than in cases of developing a color at yellow, magenta or cyan coloring layer. In other words, the amount of application energy required to develop the color at the black coloring layer is sufficient to develop the color at the yellow, magenta or cyan coloring layer. Accordingly, if the color is to be developed at the black coloring layer in the multicolor thermosensitive medium with the printing apparatus, the yellow, magenta or cyan coloring layer may also develop the color and color mixture may sometimes be conspicuous, depending on the structure of the multicolor thermosensitive medium or the application control of the printing apparatus.
SUMMARYThe disclosure has been made to solve the above-described problem and has an object to provide a multicolor thermosensitive medium and a printing apparatus that allow clear and sharp printing with a distinct outline or character, while preventing color mixture therein.
To achieve the purpose of the disclosure, there is provided a multicolor thermosensitive medium and a printing apparatus, wherein the multicolor thermosensitive medium comprises: a base material; and a plurality of coloring layers comprising: a lamination group laminated on the base material and comprising one or more lower coloring layers each of which develops a basic color; and an upper coloring layer that develops a color different from basic colors developed at the lower coloring layers, the upper coloring layer laminated on the lamination group and having higher hiding properties at a portion where the color is developed than the lower coloring layers, wherein each coloring layer has coloring properties different from each other with regard to a heating temperature level necessary for color development; and wherein the upper coloring layer develops the color at a higher temperature than any of the lower coloring layers in the lamination group, and wherein the printing apparatus comprises: a thermal head that applies thermal energy to the multicolor thermosensitive medium from a direction of the upper coloring layer; and a control means that drives the thermal head, wherein the control means controls a heating temperature at the thermal head by a unit of print cycle, in accordance with coloring properties of a coloring layer to be developed among the upper coloring layer and the lower coloring layers.
Furthermore, according to another aspect, there is provided a multicolor thermosensitive medium and a printing apparatus, wherein the multicolor thermosensitive medium comprises: a base material; and a plurality of coloring layers comprising: a lamination group laminated on the base material and comprising one or more lower coloring layers each of which develops a basic color; and an upper coloring layer that develops a color different from basic colors developed at the lower coloring layers, the upper coloring layer laminated on the lamination group and having higher hiding properties at a portion where the color is developed than the lower coloring layers, wherein each coloring layer has coloring properties different from each other with regard to a heating temperature level necessary for color development, and wherein the upper coloring layer develops the color at a higher temperature than any of the lower coloring layers in the lamination group, wherein the printing apparatus comprises: a thermal head that applies thermal energy to the multicolor thermosensitive medium from a direction of the upper coloring layer; and a control means that drives the thermal head, wherein the control means controls a heating temperature at the thermal head by a unit of print cycle, in accordance with coloring properties of a coloring layer to be developed among the upper coloring layer and the lower coloring layers, wherein the color to be developed at the upper coloring layer is black, and wherein the lamination group comprises three lower coloring layers, at which colors to be developed are cyan, magenta and yellow, respectively.
A detailed description of an exemplary embodiment of a multicolor thermosensitive medium and a printing apparatus embodying the disclosure will now be given referring to the accompanying drawings.
[1. Multicolor Thermosensitive Medium]As illustrated in
Furthermore, intermediate layers 8 are laminated between the cyan, magenta, yellow and black coloring layers 3, 4, 5, 6, respectively. On top of the black coloring layer 6, an overcoating layer 9 is laminated.
Incidentally, hatching for indicating section portions of the base material 2, the cyan, magenta, yellow and black coloring layers 3, 4, 5, 6, the intermediate layer 8, and the overcoating layer 9 is omitted in the schematic sectional view of the multicolor thermosensitive medium 1 shown in
In
As shown in
With respect to the coloring properties shown in
Meanwhile, with respect to the coloring properties shown in
Furthermore, as shown in
Still further, when two or more coloring layers from among the cyan, magenta and yellow coloring layers 3, 4, 5 develop colors, a color developed thereat is visually different from a color developed by one of the cyan, magenta and yellow coloring layers 3, 4, 5 singly.
[2. Printing Apparatus]As illustrated in
The control unit 111 includes a CPU 112, CG-ROM 113, EEPROM 114, ROM 115 and RAM 116. The CPU 112 is a central processing unit that is the nucleus of various controls in the printing apparatus 101. Accordingly, the CPU 112 controls the printing apparatus 101 itself based on various control programs.
The CG-ROM 113 is character generator memory in which image data of a character or symbol to be printed is related to code data and stored in the form of a dot pattern. The EEPROM 114 is non-volatile memory that allows writing and erasing of stored contents. The ROM 115 stores various control programs and data used at the printing apparatus 101. The RAM 116 temporarily stores a computation result by the CPU 112, or the like. The RAM 116 further stores data such as edited print data.
The control unit 111 is coupled to the head driving circuit 117 and the conveying motor driving circuit 118. The head driving circuit 117 is a circuit that supplies the thermal head 102 with a drive signal based on a control signal from the CPU 112 and controls the driving state of the thermal head 102. The conveying motor driving circuit 118 is a circuit that supplies the medium conveying motor 119 with a drive signal based on a control signal from the CPU 112 and controls the rotation of the platen roller 103 through the drive control of the medium conveying motor 119.
The multicolor thermosensitive medium 1 held between the thermal head 102 and the platen roller 103 is pressed onto the thermal head 102 with the platen roller 103 when conveyed by the rotation of the platen roller 103. Here, the side of the overcoating layer 9 coating the black coloring layer 6 (see
The thermal head 102 applies thermal energy for the color development of the multicolor thermosensitive medium 1. As mentioned in the above, the overcoating layer 9 covering the black coloring layer 6 in the multicolor thermosensitive medium 1 is pressed onto the thermal head 102, so that the thermal energy of the thermal head 102 is applied onto the multicolor thermosensitive medium 1 from the side of the overcoating layer 9 coating the black coloring layer 6.
Here, the heating temperature and the heating duration of the thermal head 102 is controlled by a unit of print cycle in accordance with the coloring properties of a coloring layer intended to develop a color among the cyan, magenta, yellow and black coloring layers 3, 4, 5, 6 in the multicolor thermosensitive medium 1, by the control unit 111 and the head driving circuit 117.
That is, the control unit 111 and the head driving circuit 117 controls the application duration and the application timing of the driving voltage to the thermal head 102 by a unit of print cycle, so as to control the heating temperature and the heating duration of the thermal head 102 in accordance with the coloring properties of a coloring layer intended to develop a color in the multicolor thermosensitive medium 1 among the cyan, magenta, yellow and black coloring layers 3, 4, 5, 6.
[2-1. Color Development Control 1]In
As has been discussed in the above, as to the coloring properties shown in
Here, in the drive control shown with the waveforms in
If the application durations of the driving voltage to the thermal head 102 is controlled as in the waveforms shown in
In
That is, according to the drive control shown in the waveforms of
Incidentally, in the multicolor thermosensitive medium 1 illustrated in
If the application durations of the driving voltage to the thermal head 102 are controlled by the drive control of the unit of print cycle illustrated on the right in
Incidentally, the belt-like area indicated with a chain double-dashed line in
In
As has been discussed in the above, as to the coloring properties shown in
Here, in the drive control shown with the waveforms in
If the application durations of the driving voltage to the thermal head 102 is controlled as in the waveforms shown in
That is, according to the drive control shown in the waveforms of
If the application durations of the driving voltage to the thermal head 102 are controlled by the drive control of the unit of print cycle illustrated in
According to the present embodiment, the thermal energy from the thermal head 102 of the printing apparatus 101 is provided from the side of the overcoating layer 9 covering the black coloring layer 6 in the multicolor thermosensitive medium 1, so that even while the dispersion of the thermal energy is partial in the multicolor thermosensitive medium 1, the thermal energy from the thermal head 102 of the printing apparatus 101 has an effect on the black coloring layer 6 (see
When executing the drive control to apply the driving voltage for developing a color only in the black coloring layer 6 comparatively long time to the thermal head 102 of the printing apparatus 101, for instance, as in the right portion of the multicolor thermosensitive medium 1 illustrated in
Furthermore, according to the present embodiment, if the thermal energy from the thermal head 102 of the printing apparatus 101 is applied on the multicolor thermosensitive medium 1 from the side of the overcoating layer 9 covering the black coloring layer 6 at a high temperature for a short period if time (see
Furthermore, according to the present embodiment, by the thermal energy from the thermal head 102 of the printing apparatus 101, the black coloring layer 6 in the multicolor thermosensitive medium 1 develops a color at a high temperature in a short period of time, and the cyan, magenta and yellow coloring layers 3, 4, 5 in the multicolor thermosensitive medium 1 develop colors at lower temperatures in longer periods of time, compared with the case of the black coloring layer 6, based on the coloring properties illustrated in
It is to be noted that the disclosure is not restricted to aspects directed to the present embodiment and that various changes and modification may be made without departing from the gist of the disclosure. There may be modified as below.
For instance, in the embodiment, the lamination group 7 laminated on the base material 2 of the multicolor thermosensitive medium 1 is composed of the cyan, magenta and yellow coloring layers 3, 4, 5; however, any coloring layer of a basic color that satisfies the coloring properties can be employed instead of the combination of the cyan, magenta and yellow coloring layers, and the number of coloring layers may be one layer, two layers, four layers or more.
Further, if the intermediate layers 8 in the multicolor thermosensitive medium 1 are made of a flexible heat-insulating material, the multicolor thermosensitive medium 1 can be wound into a small roll, so that the multicolor thermosensitive medium 1 can be stored in larger amount.
Still further, if the intermediate layer 8 below the black coloring layer 6 in the multicolor thermosensitive medium 1 is a heat-insulating layer with a prescribed thickness and high thermal conductivity, the color developed in the black coloring layer 6 can be made more distinct and the black outline or character can be seen standing out on the multicolor thermosensitive medium 1. For instance, the insulating layer here is made thicker than a usual intermediate layer, as well as having high thermal conductivity so as not to change the amount of heat transmitted.
While presently exemplary embodiments have been shown and described, it is to be understood that this disclosure is for the purpose of illustration and various changes and modifications may be made without departing from the scope of the disclosure as set forth in the appended claims.
Claims
1. A multicolor thermosensitive medium and a printing apparatus, wherein the multicolor thermosensitive medium comprises:
- a base material; and
- a plurality of coloring layers comprising: a lamination group laminated on the base material and comprising one or more lower coloring layers each of which develops a basic color; and an upper coloring layer that develops a color different from basic colors developed at the lower coloring layers, the upper coloring layer laminated on the lamination group and having higher hiding properties at a portion where the color is developed than the lower coloring layers, wherein each coloring layer has coloring properties different from each other with regard to a heating temperature level necessary for color development, and wherein the upper coloring layer develops the color at a higher temperature than any of the lower coloring layers in the lamination group, and
- wherein the printing apparatus comprises:
- a thermal head that applies thermal energy to the multicolor thermosensitive medium from a direction of the upper coloring layer; and
- a control means that drives the thermal head, wherein the control means controls a heating temperature at the thermal head by a unit of print cycle, in accordance with coloring properties of a coloring layer to be developed among the upper coloring layer and the lower coloring layers.
2. The multicolor thermosensitive medium and the printing apparatus according to claim 1, wherein the color to be developed at the upper coloring layer is black.
3. The multicolor thermosensitive medium and the printing apparatus according to claim 1, wherein the control means controls an application duration and application timing of driving voltage to the thermal head by the unit of print cycle to control a heating temperature and a heating duration in accordance with heating properties of a coloring layer to be heated.
4. The multicolor thermosensitive medium and the printing apparatus according to claim 3, wherein the lamination group in the multicolor thermosensitive medium comprises two or more lower coloring layers, each of which has coloring properties different from each other with regard to a tolerable range of the heating duration necessary for color development.
5. The multicolor thermosensitive medium and the printing apparatus directed to claim 3, wherein each coloring layer in the multicolor thermosensitive medium has coloring properties different from each other with regard to a tolerable range of the heating duration necessary for color development.
6. The multicolor thermosensitive medium and the printing apparatus according to claim 1, wherein the lamination group in the multicolor thermosensitive medium comprises two or more lower coloring layers, and color development of the two or more lower coloring layers causes to develop a color visually different from respective colors that the two or more lower coloring layers individually develop.
7. The multicolor thermosensitive medium and the printing apparatus according to claim 1, wherein an intermediate layer is laminated between coloring layers in the multicolor thermosensitive medium.
8. The multicolor thermosensitive medium and the printing apparatus according to claim 1, wherein an overcoating layer is laminated on the upper coloring layer in the multicolor thermosensitive medium.
9. The multicolor thermosensitive medium and the printing apparatus according to claim 1, wherein the lamination group comprises three lower coloring layers, at which colors to be developed are cyan, magenta and yellow, respectively.
10. The multicolor thermosensitive medium and the printing apparatus according to claim 3, wherein, among the lower coloring layers in the multicolor thermosensitive medium, a heating duration necessary for color development is longest in a coloring layer closest to the base material, and gets shorter in an order of lamination toward the upper coloring layer.
11. A multicolor thermosensitive medium and a printing apparatus, wherein the multicolor thermosensitive medium comprises:
- a base material; and
- a plurality of coloring layers comprising: a lamination group laminated on the base material and comprising one or more lower coloring layers each of which develops a basic color; and an upper coloring layer that develops a color different from basic colors developed at the lower coloring layers, the upper coloring layer laminated on the lamination group and having higher hiding properties at a portion where the color is developed than the lower coloring layers, wherein each coloring layer has coloring properties different from each other with regard to a heating temperature level necessary for color development, and wherein the upper coloring layer develops the color at a higher temperature than any of the lower coloring layers in the lamination group,
- wherein the printing apparatus comprises:
- a thermal head that applies thermal energy to the multicolor thermosensitive medium from a direction of the upper coloring layer; and
- a control means that drives the thermal head, wherein the control means controls a heating temperature at the thermal head by a unit of print cycle, in accordance with coloring properties of a coloring layer to be developed among the upper coloring layer and the lower coloring layers, wherein the color to be developed at the upper coloring layer is black, and wherein the lamination group comprises three lower coloring layers, at which colors to be developed are cyan, magenta and yellow, respectively.
12. The multicolor thermosensitive medium and the printing apparatus according to claim 11, wherein:
- among the upper coloring layer for black and the lower coloring layers for cyan, magenta and yellow included in the multicolor thermosensitive medium, a heating duration necessary for color development is longest in a lower coloring layer for cyan which is laminated closest to the base material, and gets shorter in an order of lamination, that is: a lower coloring layer for magenta, a lower coloring layer for yellow and the upper coloring layer for black which is laminated most distant from the base material, and
- among the upper coloring layer for black and the lower coloring layers for cyan, magenta and yellow included in the multicolor thermosensitive medium, a heating temperature level necessary for color development is lowest in the lower coloring layer for cyan which is laminated closest to the base material, and gets higher in the order of lamination, the lower coloring layer for magenta, the lower coloring layer for yellow and the upper coloring layer for black which is laminated most distant from the base material.
13. The multicolor thermosensitive medium and the printing apparatus according to claim 11, wherein:
- among the lower coloring layers for cyan, magenta and yellow included in the multicolor thermosensitive medium, a heating duration necessary for color development is longest in a lower coloring layer for cyan which is laminated closest to the base material, and gets shorter in an order of lamination, a lower coloring layer for magenta and a lower coloring layer for yellow,
- among the lower coloring layers for cyan, magenta and yellow included in the multicolor thermosensitive medium, a heating temperature level necessary for color development is lowest in the lower coloring layer for cyan which is laminated closest to the base material, and gets higher in the order of lamination, that is: the, lower coloring layer for magenta and the lower coloring layer for yellow, and
- a heating duration necessary for color development of the upper coloring layer for black included in the multicolor thermosensitive medium includes all heating durations necessary for color development of the lower coloring layers for cyan, magenta and yellow included in the multicolor thermosensitive medium, while the heating temperature level necessary for color development at the upper coloring layer for black is higher than any of the lower coloring layers for cyan, magenta and yellow included in the multicolor thermosensitive medium.
Type: Application
Filed: Sep 26, 2012
Publication Date: Jan 24, 2013
Applicant: BROTHER KOGYO KABUSHIKI KAISHA (Nagoya-shi)
Inventor: BROTHER KOGYO KABUSHIKI KAISHA (Nagoya-shi)
Application Number: 13/627,586